// GuitarHero.java
// Chris Wilcox
// 4/13/2013
// cs160
// wilcox@cs.colostate.edu

// ACKNOWLEDGEMENTS:
//
// This assignment was heavily copied from the geniuses at Princeton University.
// Permission to use the assignment was granted via email by Dr. Robert Sedgewick
// at Princeton, as follows:
//
// "Sure, thanks for your interest. Please acknowledge the source."
//
// Here is the assignment website we copied from:
//
// http://introcs.cs.princeton.edu/java/assignments
//
// This assignment was developed by Andrew Appel, Jeff Bernstein, Maia Ginsburg,
// Ken Steiglitz, Ge Wang, and Kevin Wayne. Copyright © 2005
//
// We gratefully acknowledge the material from Princeton used in this assignment!

import java.util.Scanner;

public class P8 {

    // Two guitar strings, for concert A and C
    GuitarString stringA;
    GuitarString stringC;

    public static void main(String[] args) {

        // Instantiate object
        P8 p8 = new P8();
        
        // Create two guitar strings, for concert A and C
        p8.stringA = new GuitarString(440.0 * Math.pow(1.05956,  0.0));
        p8.stringC = new GuitarString(440.0 * Math.pow(1.05956,  3.0));

       	// Play keyboard
      	p8.playKeyboard();

      	// 	Play file
        if (args.length >= 1)
        	p8.playFile(args[0]);
    }

    // Play from keyboard
    public void playKeyboard() {
    	
        System.out.println("Press keys to play music, 'X' exits).");

        // Processing loop
    	while (true) {

	        // Has user has typed a key?
	        if (StdDraw.hasNextKeyTyped()) {
	          
	            // Which key has been typed
	        	char key = Character.toUpperCase(StdDraw.nextKeyTyped());
	        	System.out.println("Key pressed: " + key);
	        	if (key == 'X') break;

	            // Pluck string
	            pluckGuitar(Character.toString(key));
	        }
	
	        // Play guitar
	        playGuitar();
    	}
    }

    // Play from file
    public void playFile(String filename) {
    	
    }

    // Pluck guitar strings
    public void pluckGuitar(String note) {

        if      (note.equals("A")) stringA.pluck();
        else if (note.equals("C")) stringC.pluck();
    }

    // Play guitar strings
    public void playGuitar() {
        
    	double sample = 0.0;

        // Combine the samples
        sample = stringA.sample() + stringC.sample();

        // Send sample to standard audio
        StdAudio.play(sample);

        // Advance the guitar simulation
        stringA.tic();
        stringC.tic();
    }
}